#pragma once

#include <iostream>
#include <cstdio>
#include <string>
#include <iostream>
#include <string>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>

#define PATH "."
#define FILENAME "fifo"

#define ERR_EXIT(m)         \
    do                      \
    {                       \
        perror(m);          \
        exit(EXIT_FAILURE); \
    } while (0)


class NamedFifo
{
    public:
    NamedFifo(const std::string &path,const std::string &name):_path(path),_name(name)
    {
        umask(0);
        _fifoname=_path+"/"+_name;
        int n=mkfifo(_fifoname.c_str(),0666);
        if(n<0) ERR_EXIT("mkfifo");
        else
        {
            std::cout << "mkfifo success" << std::endl;
        }
    }

    ~NamedFifo()
    {
        //删除管道文件
        int n=unlink(_fifoname.c_str());
        if(n==0)  ERR_EXIT("unlink");
        else
        {
            std::cout << "remove fifo failed" << std::endl;
        }
    }
    private:
    std::string _path;
    std::string _name;
    std::string _fifoname;
};

class FileOper
{
    public:
    FileOper(const std::string &path,const std::string &name):_path(path),_name(name),_fd(-1)
    {
        _fifoname=_path+"/"+_name;
    }

    void OpenForRead()
    {
        //写端未打开管道文件，读端会阻塞在open调用中
        _fd=open(_fifoname.c_str(),O_RDONLY);
        if (_fd < 0)
        {
            ERR_EXIT("open");
        }
        std::cout << "open fifo success" << std::endl;
    }

    void OpenForWrite()
    {
        //write
        _fd=open(_fifoname.c_str(),O_WRONLY);
         if (_fd < 0)
        {
            ERR_EXIT("open");
        }
        std::cout << "open fifo success" << std::endl;
    }

    void Write()
    {
        std::string message;
        int cnt=1;
        pid_t id=getpid();
        while(true)
        {
            std::cout<<"Please Enter#";
            std::getline(std::cin,message);
             message += (", message number: " + std::to_string(cnt++) + ", [" + std::to_string(id) + "]");
             write(_fd,message.c_str(),message.size());
        }
    }

    void Read()
    {
        while(true)
        {
            char buffer[1024];
            int number=read(_fd,buffer,sizeof(buffer)-1);
            if(number>0)
            {
                buffer[number]=0;
                std::cout << "Client Say# " << buffer << std::endl;
            }
            else if(number==0)
            {
                std::cout << "client quit! me too!" << std::endl;
                break;
            }
            else
            {
                 std::cerr << "read error" << std::endl;
                break;
            }
        }
    }
        void Close()
        {
            if(_fd>0)
            close(_fd);
        }
        ~FileOper()
        {}
    private:
    std::string _path;
    std::string _name;
    std::string _fifoname;
    int _fd;
};